ok so about a month ago my laptop started shuting down during my favorite online game sanctum. but only during games and only sanctum. a couple people said that it sounded like overheating. but i dont get an error message from windows and it doesnt reboot itself or anything like that. it just shuts off, i can reboot it just fine and it may or maynot do it again on the next game of sanctum. then today it started doing it during reincodeing with dvd shrink. anyone have any ideas.